Millstone pick



(NoModeL) W. C. MoDONNELL & .A. L. ANDERSON.

"MILLSTONE PIGK.

No. 280,647. Patented Ju1y.3 1883.

WITNESSES jINVENTOR 0714 6666 ATTORNEYS.

PETERS. Phutn-mmwhu. Wahhflm D. c.

UNITED STATES PATENT OFFICE.

WILLIAM C. MODONNELL AND AXEL L. ANDERSON, OF MONTELLO, IVIS.

, MlLLSTONE-PICK.

SPECIFICATION forming part of Letters Patent No. 280,647, dated July 3,1883.

Application filed February 27, 1883. (N model.)

To all whom it may concern:

Be it known that we, WILLIAM CHARLES Me- I DONNELL and AXEL LEONARDANDERSON, of

Montello, in the county of Marquette and State of Wisconsin, haveinvented a new and useful Improvement in Mill-Picks; and we do herebydeclare that the following is a full, clear, and exact description ofthe same, reference being had to the accompanying drawings, forming partof this specification, in which- Figure l is a side view of the pickwith a part of the handle broken away. Fig. 2 is a side view of the headof the pick with the parts detached and Fig. 3 is a top view of the headof the pick. Fig. 4 is a View of the upper portion of the handle,looking at it in a plane at right angles to the view given in Fig. 1.

Our invention relates to certain improvements upon that form ofmill-pick in which the pick-head is formed of two toothed plates thatare clamped together by a screw upon an adjustable blade having an upsetor headed end, which is caught between and held by the teeth of the twoplates, and which blade may be adjusted farther'out as it wears away.

Our invention consists in combining with such a head, as fastenedtogether by a screw, a screw-driver or wrench permanently fixed to thehandle carrying the head, whereby the said wrench or screw-driver isalways availa ble for unscrewing the plates of the head, and is notliable to become lost.

In the drawings, A A represent two metal blocks or plates havingcoinciding notches a, which plates are clamped together, by means of ascrew, B, upon the cutting-blades O, of which there is one at each end.These cut ting blades have a sharp or chisel-shaped edge at their outerends, and at their inner ends are upset, or provided with heads I), thatfit in the coinciding notches in the inner faces of the plates, whichnotches .form shoulders, against which the heads bear to resist theimpact of the blow and prevent the blades from being driven up. Thereare several of these sets of notches at each end, so that as thecuttingblades wear shorter they may be set farther out toward the endsof the plates A A. The

screw B, which clamps the two plates A A together, has its head 0countersunk in a hole in the plate A, and is formed with two notches orholes, (1 d, to receive the prongs of a wrench or spanner for turning itin or out. In the place of these notches, however, a straight nick maybe used, adapted to receive a screwdriver. The head, as formed of the Itwo plates A A, it will be seen is thickest in the middle, and tapers toboth ends, and it is held in the handle D by being wedged into ataperingslot cut through the handle, near its end, in which slot it is held byfrictional contact. The object of countersinking the head of theclamping-screw will here become apparent, for this permits the head towedge itself freely into the slot in the handle up to its greatestthickness without obstruction.

The handle D is made of strong hard wood, and has an enlarged'square endwhere the slot is made through it, and to prevent this end fromsplitting from the wedging action of the head metal strips or bands 6 eare arranged upon opposite sides of the handle, on each side of theslot, and are fastened together by long rivets f f, passing entirelythrough the handle. To one side of the handle, near its end, is alsofastened a plate, 9, having two prongs, g, which fit into the holes ornotches in the head of the clampingscrew B, and serve as a wrench forturning the same in and out. This wrench, it will be seen, can never getdetached from. the handle or become lost, and it co-operates withanother metal strip, h, on the opposite side, to which it is fastened byrivets i, for the purpose of further strengthening thehandle at thispoint. v

Having thus described our invention, what we claim as new is Thecombination, with a mill pick head composed of two plates clampedtogether by a screw, of a handle having awrench or screwdriverpermanently attached thereto for turning the screw, substantially asdescribed.

, WILLIAM CHARLES MCDONNELL.

AXEL LEONARD ANDERSON. In presence of J. J. WALL, L. S. CHITTENDEN.

